Haast.—On the Extinct Genus Harpagornis. 71 
principally the one on the ulnar side, are well seen, as well as the intermuscular 
ridge on the palmar side, and the flat processes for the attachment of the 
muscles, 
RADIUS. 
Of the left radius of Harpagornis moorei we possess only a fragment of the 
proximal side. The proximal end is well expanded, and the tubercle for the 
insertion of the biceps stands considerably forward, the shaft becoming 
afterwards very flat towards the ulna, not being so much bent as in Aquila. 
The radius of Harpagornis assimilis (Pl. VIIL, Figs. 5 and 6), which has 
a total length of 7-62 inches, against 7:90 inches for the corresponding bone in, 
Aquila audax, is, like the ulna, of much stouter proportions. It is more bent 
towards its distal extremity, so that the same stands at a greater angle to the 
shaft than any of the recent species. 
Mertacarpus. РІ. VIIL, Fig. 7. 
Only one specimen of the metacarpus belonging to Harpagornis assimilis 
was obtained, being in an excellent state of preservation. 
It is not only a little longer than that of Aquila, but also much stouter in 
its proportions. This is most conspicuous in the medius metacarpal and the 
proximal end. 
'The process for the attachment of the index phalanx is broad and heart- 
shaped, and the two principal intermuscular ridges upon the medius metacarpal 
enclose a broad and well-defined channel. 
PELvis. Pl. ІХ., Figs. 1, 2, and 3. 
In my iniroductory remarks I stated that all search after the pelvis of 
Harpagornis moorei had been unsuccessful, but that we were fortunate enough 
to obtain this important bone of the smaller species H. assimilis when 
excavating the other bones belonging to the latter. 
Last year, when visiting the Colonial Museum in Wellington, I observed 
amongst the specimens of our extinct avi-fauna a perfect pelvis, which, on 
examination, I assigned to Harpagornis. Dr. Hector, at my request, allowed 
me to take this fine specimen with me for comparison and description. After 
placing it near the pelvis of H. assimilis, with which it agreed in all main 
points except its larger size—bearing the same proportion as the bones of 
H. moorei do to those of the smaller species—I had no hesitation in assigning 
it at once to the former. ; : 
This compound bone, belonging to a fully-grown but still young individual, 
has all the characteristics which belong to the pelvis of a diurnal raptorial 
bird, some of the complex features, owing to its enormous size, being developed 
in a most remarkable degree. Tt combines great strength with lightness and 
